Insulating collector-spool



L. STEINBERGERf 'INSULATING vCOLLECTOR SPOOL.

'(APPLlATloN msn MAK. 6, 1920.

1,382,609. l Pmdmelzl, 19,21..

y v 30 3f, ////Zi25 l/V VEN TUR UNITED :STATES PATENT OFFICE.

LOUIS VSTEIl'BIERG-ER., OF BROOKLYN, NEW YORK.

INSULTING GOLLECTOReSPOOL.

lApplication filed March 6,

To all whom t may concer/1t.'

Be it known that I, Louis STEINBERGER, a citizen ofthe United States, and a resident of the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful improvements in Insulating Collector- Spools, of which the following is a specification.

My invention relates generallyto iniprovements in insulating-devices of the spool type which are to be used in combination with co-acting brushes in automobile installation, or the like. j

One of the objects of the invention is to provide an insulator of the type disclosed so constructed that the hub or central poi tion will readily be kept clean and free from dirt, dust and foreign material, the presence of which has a deleterious effect.

Other objects will appear from the following description and c laims.

Referring to the drawings:

Figure 1 is a vertical section of a form of spool embodying my invention.

Fig. 2 is a sectional view on line 2-2 of Fig. 1.

Fig. 3 is a detail of the metallic ring* surrounding the bobbin portion of the insu-k lating spool.

In the drawings like reference characters refer to like parts: t

10 is the body or bobbin portion and 11 and 12 are the flanges extending circumferentially and radially from each side of the body portion. In the form illustrated both surfaces of each flange are smooth and so constructed and formed that the thickest portion is adjacent the hub and each flange decreases in thickness to its periphery, Vas well understood in the art.

Embedded in the outer surface of the body bobbin portion is a metal ring or inselt 2O which extends entirely around the central body portion of the spool, as shown. The metal ring is provided with two flanges 21 and 22 and with a central raised portion 23 having a cylindrical surface 24 and two verticalsides 25 and 26, which intersect at right angles with the surfaces 27 and 28 of the flanges 21' and 22, thereby forming grooves 30 and 31 between the raised metal portion 23 and the sides of the insulating flanges 11 and 12, the said grooves thus hav-1 ing metallic surfaces at the bottom thereof,

Specification of Letters Patent.

Patented June 21, 1921.

1920. serial No. 363,692.

keep the grooves 30 and 31 free and clean of dirt, dust, oil and any other deleterious matter, and these grooves by reason of their metallic linings or surfaces can bemore easily and readily cleaned than otherwise, because of the impervious, strong and nonabsorbent quality of metal which renders the same capable of ready and thorough cleansing. In the operation of the structure the brushes grind off because of the continual revolution of the collector and the carbon, powder, dust and oil, which has been drawn into the grooves, is more readily thrown off the spool and the surface of the metal against which the brush acts, is always clean. This structure is efficient because it is well known that these` spools revolve in use and it is very desirable that the dust, carbon and all material of like nature if permitted to forni and stick to the structure, renders it much less effective.

Vhile I have showna spool having but two flanges and a single metal insert it is obvious that the spool may be extended in size so it may be provided with a plurality of insulating flanges and a plurality of metal ring inserts when such an enlarged construction is desired.

A hole l0 extending axially through the spool is provided as shown for the mounting of the spool in place and it may or may not be lined with metal 50 as desired.

The insulating portions of my device may be made of any approved insulating material, but l prefer to use in this construction a moldable insulating material well known in theart as electrose It is to be understood that the above description and drawings are merely illustrative and the .invention is not to be limited in any respect, except asdeflned in the subjoined claims.

Having thus described my invention what l claim as new and desire to secure by Letters Patent is:

1. A spool insulator provided with circumferential radially extending insulatingr flanges, and a metal ring secured to the central portion of the spool and extending alongthereofbetween the flanges, said ring provided with a centrally arranged raised porsoy tion forming grooves with metallic bottom surfaces between the central metallic raised portion and insulating flanges.

2. A spool insulator, provided with circumferential radially extending insulating flanges, a metal ring molded to the central portion of the spool and extending along thereof between the flanges, said ring provided with a centrally arranged raised portion forming grooves with metallic bottom surfaces between the central metallic raised portion and the insulating flanges.

3. A spool insulator provided with circumferential radially extending insulating flanges, a metal ring secured to the central portion of the spool and extending along thereof between the flanges, said ring provided with a centrally arranged raised portion having a cylindrical surface and vertical sides, said metallic raised portion and said insulating flanges forming grooves therebetween, the grooves having metallic bottom surfaces extending between the central metallic raised portion and the insulating flanges.

4. A spool insulator provided with a central portion of insulating material, and with circumferential radially extending flanges on either side thereof, a metal ring secured to the central portion and extending between the flanges, the said ring having a centrally arranged raised portion provided with a cylindrical top surface and vertical side surfaces, forming grooves between the said raised metal portion and the insulating flanges, the grooves being metal lined on the bottom and on a side thereof.

Signed at the borough of Manhattan, cit. county ant State of N ew York, this 1st day of March, 1920.

LOUIS STEINBERGER. 

